"What is, is, and it is not possible for what is, not to be. What is not, is not, and it is not possible for what is not, to be. For change to be possible, it must be possible either for what is, not to be; or for what is not, to be. Therefore, change is impossible."

-Parmenides

“Dasein is ontically distinguished by the fact that, in its very Being, that Being is an issue for it” (Martin Heidegger, Being and Time 4: 32).